如何让我的精灵图像背景看起来透明？

Question

I am trying to make sprites appear as images in my pygame code. Here is one of the sprites:

class Enemy(pygame.sprite.Sprite):
    def __init__(self):
        super(Enemy, self).__init__()
        self.surf = pygame.Surface((20, 10))
        self.surf = pygame.image.load("Rocket 1.png").convert()
        self.rect = self.surf.get_rect(
            center=(
                random.randint(SCREEN_WIDTH + 20, SCREEN_WIDTH + 100),
                random.randint(0, SCREEN_HEIGHT),
            )
        )
        self.speed = random.randint(5, 10)

    def update(self):
        self.rect.move_ip(-self.speed, 0)
        if self.rect.right < 0:
            global score
            score += 1
            self.kill()

It works, but the image displays with a black background. Here is the image: As you can see, the image has no background, but when I run my code, it still displays it as having a black background.

Answer 1

I used the 1st link given by @mkrieger1 and found out that .convert_alpha works. Thanks!